At 37:52 as Keller and Stone are walking down the sidewalk discussing the status of the case, the camera suddenly pulls back and you can see that the two actors have collected quite a crowd of onlookers following the filming and walking behind the actors on both sides of the street.
In the epilogue of this episode Keller and Stone are driving and Stone notices a banner welcoming the U.S.P.P.D. to their convention. Keller wonders aloud for what organization the initials stand & Stone says, "I don't think I want to find out." The organization is: United States Pentagon Police Department.
William Windom, who played Russ Rankin, would go on to play Dr. Seth Hazlitt on the TV series "Murder, She Wrote".
Jo Ann Harris, who played Lita Brewer, was married to Jerry Belson, TV writer and co-creator with Garry Marshall of the TV series "The Odd Couple".
At 32:40 (The beginning of act IV) Keller (Michael Douglas) is interviewing a witness. In the background of the scene and high above where the crew is filming, there is a sizable group of people intently watching